1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50f05cbd932339cf2f30790b8a5dc4f5ab201cb0c4f87adc1ef81f765200950. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdd5eee8-69ac-4e8d-92b8-1a52cf0907fb.json and https://artists.proofprofile.net/proofs/artist/fdd5eee8-69ac-4e8d-92b8-1a52cf0907fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe779064032e708e63086392c1243d6d3d72c9ae7de4bbc4ee17dd97e2f395e70. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:16:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2517030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43bcc17c7fc1c7c36a6e1cd7f5aca49423afe091486d8b8c53c056c7bd7611f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAKA2517131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11307193bf4d8d510b9eae56daa7ffbfbc9589b5fdd934974e93f09383dd7b22. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:58:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2517200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec159b7a7ff03920f3070aadabfbf8447713875b2779013785745f9f371a1f24. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAKA2516906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb5db8d3ded939fcd2a96349e47dc7aefbd60ee9aa16ddd6ee0dd41c1c1d669. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2517155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181da3d3840d125a196b5ba9f91aa7ff133014b7eb9895978b5f3f1d6f89e533. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2517063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f578816189330e4779033e8c297458b8a5bd9269cfd87befcd5926f34601819. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAKA2517004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c30339ab45fe9a66899fc79eb97a3111b1b01e73dd1a9697176a9d03cb0909b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2517160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7db33c629dc8ede59b54e63999903f4eacd52dfb4177f76898389ff6fd9cd2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2517091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac8fb44020511d66a823ad572558fdbcb9c0dc2e122cfad92e2d2833b1e17d0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2516981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4138123b1bc584ca5770eae63a0ecc7fd9d125348f72a08a57e708b4485286. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2517100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034799b039ab78539b482de907c724a87921f2cf1727bbbdf979db204351b47e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2517208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b644ed265e8ddbf15e10a90a5c74728c27f40aae7bcd7aeb984fb47b37c543. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAKA2524733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26c7e7bf9999bfd0dc41523594b75889447942a296e223820782be81ceb9462. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2524742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785e9235d2d0e7ea44ed52fc8bf934f05d560a8aef377f21462c647e17a4de62. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2524687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09c2c66750831a79123b7388c730de33ea3b7cf1345c750290e599a492f6c74. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:03:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAKA2524692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6933f75a187c84b57861833714e12fae2cc3fd8225826630a1ac3e899c439364. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAKA2524766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a6e2bb0fc97b031bd657464fd2a38e42427b3137af7b424abe5bab3460ae66. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAKB2524757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf890cd67aa69c7bd97700afc33717bb0a53bb8a614478a2c2113ff486f4228. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJZ2524698.